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[aprssig] Nuvi 350/Tracker 2

Scott Miller scott at opentrac.org
Sun Jan 25 23:19:33 UTC 2009


I read over that section and I don't see it.  I know that's how Xastir 
behaves, but I don't know where it's defined.

Scott
N1VG

Bob Bruninga wrote:
>>> For what it is worth, the APRS 
>>> protocol expects all stations under 
>>> a callsign to receive and display 
>>> incoming messages, but ONLY the call 
>>> with the matching SSID to ACK it.
>>
>>Is that in the spec somewhere?
> 
> Should be.  A message from one station to another station is really a message from a person to a person.  Since the recepient can be located at any one of his APRS stations at any instant in time, it was best to have all of them decode the message, but only the intended one to ack it.
> 
> Of course delivery reliability is highest to the intended SSID match since it will be sent until acked.  But the others may only have a chance of getting one of the copies while monitoring.
> 
> Bob, Wb4APR
> 
> 
> 





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